WARNING: This page is about a different car, the 2024 Audi S7, 2024 Audi RS 7 Sportback, and 2024 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Special tools and workshop equipment required
Or: Multipurpose Additive for Gasoline Engines :G 001 780 M3